Steam-boiler or other furnace



(No Model.)

0. GE ARING.

. STEAM BOILER OR OTHER FURNACE.

Patented May 1 1883.

UNIT STATES PATENT OFFICE.

oHARLEs GEARING, or PITTSBURG, PENNSYLVANIA, ASSIGNOR on seven- EIGHTHS TO SAMUEL. HARPER, OF SAME PLACE, AND HENRY P. oooKn, LEWIS M. HOSEA, AND CHARLES F. HESSER, or oINoINNArI, oHIo.

STEAM-BOILER OR OTHER FURNACE.

SPECIFICATION forming part of Letters Patent No. 276,576, dated May 1, 1883.

Application filed December 26, 1882. (No model.)

To all whom it may concern: Be it known that I, CHARLES GEARING, a citizen of the United States, residing at Pittsburg, Pennsylvania, have invented new and useful Improvements in Steam- Boiler and other Furnaces, of which the following is a specification.

My invention relates to steam-boiler and other furnaces, its object being toim prove their Io construction and obtain a more perfect combustion with reference to the use of inferior fuel-such as slack or culmand the prevention of smoke. My invention consists in a fire-front pro- 1 vided with a box or chamber which is open to the furnace from the grate-level upward, and closed at the front and sides, except the firedoor opening, in combination with oneor more horizontal hot-air pipes located in the said box or chamber, in the angle of its front and top walls, and provided with openings or nozzles, said pipe or pipes projecting through the side wall of the box or chamber and connecting with hot-air and steam supplies. t

The invention further consists of certain other features of construction and combination, all of which will be first described in detail,

. and afterward pointed out in the claims.

My invention is embodied in mechanismv illustrated in the accompanying drawings, in which Figure -1 is a side elevation, partly in section, of a steam-boiler furnace containing my improvements. Fig. 2 is afront'elevation of the boiler-furnace. Fig. 3 is a front view 5 (partial) of the blast-pipe andnozzles, with protecting-shield. Fig. 4. is across-section of the blast-pipe and shield in the plane or m. Fig. 5 is an axial section of the steam-jet or injector device.

0 My invention may be usefully applied to existing structures,forwhich reason I haveshown in the drawings an ordinary cylindrical flueboiler with the common setting.

The grate A, of the usual construction, 1 pre- 4 5 fer to set somewhat lower than is customary, for the double purpose of maintaining a larger I body of fuel on the grate, and having alarger combustion-chamber above.

The fire-front B of the setting is preferably the sides and bottom and open at the top, where it is provided with a hinged lid or damper, c, to regulate the admission of air, and having its inner wall, 0, inclined inward, with a clear space beneath it, adjacent to the grate, for the passage of the air to the fuel upon the grate, the wall 0 thus serving the double purpose of a deflecting and heating plate for the air entering through the upper opening, regulated; by the damper c. The exterior front wall of the door is provided with a small opening covered by a hinged lid or door, 0 to be used in stoking the fire without opening the main door 0 to the admission of cold air.

Within the box or chamber D, in the angle of its front and top walls, above the fire-door opening, are arranged two (2) horizontal air- I pipes, E E, passing through the chamber 1) from side to side, through suitably-formed apertures, forming bearings. Each of these pipes is closed at one end, and at the other is connected with air-channels or heating-fines, arranged in the side walls of the furnaee-settin g,

or otherwise, as may be most convenient. The

heated steam supplied from the boiler through a pipe, 12, and through a superheating-coil, P, arranged atanyconvenient pointin the furnace.

The injector devices I, supplied from the coil P and pipe 12, are preferably arranged at the ends of the horizontal pipes E, where they connect with the air-heating fines, the injectors being substantially Ts or elbows, in one end of which the steam-nozzle t is arranged, to force the air drawn from the flues toward the exit-openiu g n.

WVhen, in a battery, the boilers are set side by side the chamber D is duplicated for each fire-door, and the pipes E E are extended throughout the series and supplied by the same steam-blasts.

In operation the nozzles n are adjusted to project their respective blasts in divergent planes upon the incandescent fuel. I find it preferable to direct the lower blast considerably downward toward the front ofthe fuel-bed, where it penetrates the fresh fuel and effects the preliminary combustion. It also coacts with the air-opening and deflecting-shield c, to draw in an increased supply of air, which is partially heated by passing over the shield c, and forced by the blast into intimate mixture with the gases evolved from the burning coal. The upper blast is best directed to a point a little below the crown of the bridge-Wall, as indicated by the arrow, thus sweeping across the surface of the incandescent fuel and mingling and igniting the gases of combustion. With highly-bituminous coal the air-opening and deflecting-partition of the fire-door perform an important function in admitting the requisite quantity of'airand compelling its immediate contact with the incandescent fuel.

The benefits of my invention may be obtained in a degree by the use of one of the blasts only; but I prefer to use two in the manner stated, as more perfect results are thereby obtained.

It will be obvious that the same devices may be applied to any other furnace employed in the arts where high hcatsand an economical combustion are desired.

I claim as my invention and desire to secure by Letters Patentthe fire-door opening, in combination with one I or more horizontal hot-air pipes located in the said box or chamber, in the angle of its front and top walls, and provided with openings or nozzles u, said pipe or pipes projecting through the side wall of the box or chamber and connecting with hot-air and steam supplies, substantially as described.

2. In a boiler-furnace, a fire-front, B, provided with the box or chamber D, which is opento the furnace, but otherwise closed, except the fire-door, in combination with one or more horizontal hotair pipes extending through the box or chamber, and provided with openings or nozzles a, said pipe or pipes beingconnected with hot-air and steam supply pipes by a device or devices which permit their rotary adjustment to change the direction of the blasts relative to the incant'lescent fuel, substantially as described.

3. The combination, in a boiler-furnace, of a fire-front, 13, provided with a projecting box or chamber, D, open to the furnace, but otherwise closed, except the fire-door, with one or more horizontal hot-air pipes, E, supported within the said box or chamber, andfree to rotate therein, for the purpose of changing the direction of the blast relative to the incandescent fuel, substantially as described.

4. In a boiler-furnace, a fire-door, O, havi'ng at its top ahinged lid,c, and on its interior a'n inclineddeflecting-plume, combined with hori zontal hot-air pipes E, located above the said deflecting-plate, substantially as described.

5. In a boiler-furnace, the combination of a blast-pipe, E, provided with openings or nozzles 'n, and capable of rotary adjustment. with the fixed shield S, encirclingthe pipe and having slots 8, substantially as described.

In testimony whereof I' have hereunto set my hand in the presence of two subscribing witnesses. f

CHARLES GEARING. V Witnesses:

JOSEPH A. KLAYER, L. M. HOSEA. 

